Creon’s argument that he is older and wiser than his son is an example of

From the Greek Aristotelian modes of persuation, when the elements of an argument appeal to the ethical responsabilities of a culture based on its fundamental character,  credibility or beliefs as a society, we talk about "ethos".

Antigone is an ancient Greek tragedy writen by Sophocles influenced by the political and socio cultural life of Athens after a civil war, in the story, after both sons of Oedipus kill each other, Creon, one of those characters that rely on the appeal of ethos to develop an argument, survives and retain rulership of Thebes.

Creon’s argument that he is older and wiser than his son is an example of "Ethos".  

Explanation:

the words “strangest” and “unusual” suggest that the narrator is about to tell the story of an odd or puzzling group of people.

c. nature verses humanity is correct